How to Open iOS Port 11000 for Visual Studio 2022 Debugging

I’m not sure why your third-party tooling isn’t working in this case, but I can assure you that iOS does not limited access to port 11,000 [1]. So, if you’re having problems getting these connection to go through with your third-party tooling, I recommend that you escalate that via the support channel for those tools.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

[1] Consider this code:

final class Listener {

    var listener: NWListener? = nil
    
    func start() -> NWListener {
        print("listener will start")
        let listener = try! NWListener.init(using: .tcp, on: 11000)
        listener.service = .init(type: "_test._tcp")
        listener.stateUpdateHandler = { newState in
            print("listener did change state, new: \(newState)")
        }
        listener.newConnectionHandler = { connection in
            print("listener will reject connection")
            connection.cancel()
        }
        listener.start(queue: .main)
        return listener
    }
    
    func stop(listener: NWListener) {
        print("listener will stop")
        listener.stateUpdateHandler = nil
        listener.newConnectionHandler = nil
        listener.cancel()
    }
    
    func startStop() {
        if let listener = self.listener {
            self.listener = nil
            self.stop(listener: listener)
        } else {
            self.listener = self.start()
        }
    }
}

If you run it on a device (I’m testing with Xcode 16.4 on macOS 15.5 targeting iOS 18.5) and start the listener, you’ll see this:

listener will start
listener did change state, new: ready

You can then connect to your iOS device from your Mac like so:

%  nc dr-nobel-price.local. 11000

The connection won’t go through, because the listener rejects everything, but you’ll see that the listener actually got a connection request that it could have accepted:

listener will start
listener did change state, new: ready
listener will reject connection
…

Note If you want to try this test for yourself, make sure set up both NSLocalNetworkUsageDescription and NSBonjourServices in your Info.plist. See TN3179 Understanding local network privacy for more about this.

Keeping it simpler, I just used NetCat from my Mac wirelessly to encounter the following:

Last login: Mon Jul 14 13:50:48 on ttys000
marcgeorge@iMac ~ % nc -vnzu 192.168.1.167 11000
Connection to 192.168.1.167 port 11000 [udp/*] succeeded!
marcgeorge@iMac ~ % nc -vnz 192.168.1.167 11000 
nc: connectx to 192.168.1.167 port 11000 (tcp) failed: Connection refused

I am going to proceed using your script project, suggesting but expect simliar results.